These are a TECHNICALLY INTENSE species of voice coil lead wires, which are manufactured with HIGH FATIGUE LIFE ROHS ALLOYS, generously silver plated, constructed in a fashion where upon automatic cutting the ends do not fray. The yarn contained in these voice coil lead wires is flame retardant and low shrinkage. These lead wires are used in TOP LIN ELUXURY AUTOMOBILES AND HOME ENTERTAINMENT SYSTEMS. These voice coil lead wires are weather proof and resistant to heat, moisture, salt, humidity and cold.